PE exam 2 Flashcards
Name the three types of muscle tissue and explain their purpose
Smooth muscles are sometimes also called involuntary muscles and they are usually in sheets, or layers, with one layer of muscle behind the other. You can’t control this type of muscle. Your brain and body tell these muscles what to do without you even thinking about it. You can’t use your smooth muscles to make a muscle in your arm or jump into the air.
The muscle that makes up the heart is called cardiac muscle. It is also known as the myocardium. The thick muscles of the heart contract to pump blood out and then relax to let blood back in after it’s circulated through the body.
Just like smooth muscle, cardiac muscle works all by itself with no help from you. A special group of cells within the heart are known as the pacemaker of the heart because it controls the heartbeat.
Skeletal muscles are voluntary muscles, which means you can control what they do. Your leg won’t bend to kick the soccer ball unless you want it to. These muscles help to make up the musculoskeletal— the combination of your muscles and your skeleton, or bones.
Together, the skeletal muscles work with your bones to give your body power and strength. In most cases, a skeletal muscle is attached to one end of a bone. It stretches all the way across a joint (the place where two bones meet) and then attaches again to another bone
What four parts do arteries and veins have in common?
Endothelium, tunica adventitia, tunica intima, tunica media
How many pints of blood does the human body contain?
Ten
What is the rate of red blood cell formation in the human body?
2 million per second
What is the purpose of the cardiovascular system?
The cardiovascular system of the human body has one distinct job; that is to pump the blood to the different parts of the body.
What is the purpose of each of the four major organs of the cardiovascular system?
The purpose of the four major organs are:
Epiglottis - the flap of cartilage lying behind the tongue and in front of the entrance to the larynx. At rest it allows air to pass through the larynx and into the rest of the respiratory system. During swallowing, it folds back to cover the entrance to the larynx, preventing food and drink from entering the windpipe.
Trachea - begins immediately below the larynx and runs down the center of the front part of the neck and ends behind the upper part of the sternum. Also known as the windpipe, the trachea is the passageway for air entering and leaving the lungs.
Lungs – exchange oxygen and carbon dioxide gasses in the air sacs or alveoli. Air is inhaled through the nose and mouth and travels down into the alveoli, where the oxygen enters the bloodstream and the carbon dioxide leaves the bloodstream and returns through the lungs to be exhaled from the body.
Heart – the pumping system which takes in deoxygenated blood from the veins, delivering it to the lungs for oxygenation and then pumping it into various arteries to be transmitted to where it is needed throughout the body for energy. The heart is about the size of a fist.
What is the purpose of the endocrine system?
The endocrine system is the system that controls the body by using hormones to stimulate the metabolic activities of the cells.
What are the “chemical messengers” that help the endocrine system carry out the physiological processes?
Hormones
Richard was listening to his teacher lecture in Biology class. The teacher was using a digital presentation but Richard could not read all of the slides. Some of them seem blurry or distorted. What eye condition might Richard be experiencing?
a. Myopia (nearsightedness)
b. Hyperopia (farsightedness)
c. Presbyopia (aging eyes)
d. Astigmatism (distorted vision)
d. Astigmatism (distorted vision)
Kayla has been having trouble seeing the street signs as she is driving. Last week she missed the turn to go to her friend’s house. What eye condition might Kayla be experiencing?
a. Myopia (nearsightedness)
b. Hyperopia (farsightedness)
c. Presbyopia (aging eyes)
d. Astigmatism (distorted vision)
a. Myopia (nearsightedness)
Graciela loves to do needle point. Lately she is going slower and slower because she cannot see well. She is worried that she will not be able to finish her cross-stitch project in time for her mom’s birthday. What eye condition might Graciela be experiencing?
a. Myopia (nearsightedness)
b. Hyperopia (farsightedness)
c. Presbyopia (aging eyes)
d. Astigmatism (distorted vision)
b. Hyperopia (farsightedness)
Since Fatima has turned 50 years old, she is having more trouble with her eyes. In order to read the morning newspaper she has to hold it out away from her. What eye condition might Fatima be experiencing?
a. Myopia (nearsightedness)
b. Hyperopia (farsightedness)
c. Presbyopia (aging eyes)
d. Astigmatism (distorted vision)
c. Presbyopia (aging eyes)
If you have a condition known as tinnitus, what part of your body is affected?
a. Eyes
b. Mouth
c. Teeth
d. Ears
d. Ears
Nathan has been falling down lately. It seems that he cannot keep his balance. What part of Nathan’s body could be affected?
a. The cornea of the eye.
b. The semicircular canals of the ear.
c. The cortex of the brain.
d. The valves in the heart.
b. The semicircular canals of the ear.
Why is it important to protect your ears from extremely loud noises?
a. Loud noises can cause permanent hearing loss.
b. Loud noises can increase the amount of wax in your ears in order to protect the ear.
c. Loud noises can cause the eardrum to swell.
d. Loud noises can cause osteoporosis of the ear.
a. Loud noises can cause permanent hearing loss.
Tao went to the beach and forgot to use sunscreen, which resulted in sunburn. His skin was red and painful to touch. What layer of the skin did the sunburn affect?
a. Dermis
b. Hypodermis
c. Epidermis
d. Hyperdermis
c. Epidermis
Bryan weighs 210 pounds and is 5’3” tall. If he continues to gain weight and not exercise properly, what might occur?
a. He might develop miopia.
b. He might develop Attention Deficit Disorder.
c. He might develop hypertension.
d. He might develop AIDS.
c. He might develop hypertension.
I am a nutrient that helps to repair or replace healthy cell and tissues in the body. What am I?
a. Fiber
b. Carbohydrate
c. Protein
d. Fat
c. Protein
If you are having trouble with your digestive tract (constipation), what should you increase in your diet?
a. Dietary fiber
b. Carbohydrate
c. Protein
d. Fat
a. Dietary fiber `
I am a nutrient that is needed to carry and store vitamins for the body. What am I?
a. Dietary fiber
b. Carbohydrate
c. Protein
d. Fat
d. Fat
Adriana wants to keep her eyes healthy. What vitamin should she add to her diet?
a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin D
a. Vitamin A
I am a mineral that strengthens your bones and teeth. What am I?
a. Vitamin D
b. Vitamin B12
c. Iron
d. Calcium
d. Calcium
How do you calculate Body Mass Index (BMI)?
a. Height in inches divided by weight in pounds squared and multiplied by 703.
b. Weight in pounds divided by the height in inches squared and multiplied by 703.
c. Height in inches squared divided by 703 and then subtracted from the weight in pounds.
d. Height in inches divided by 703 squared and multiplied by weight in pounds.
b. Weight in pounds divided by the height in inches squared and multiplied by 703.
Rachel has a BMI of 28. Should she be concerned about her health?
a. Yes, because being overweight can cause heart disease.
b. No, because all of her friends have a high BMI as well.
c. No, because she has no symptoms.
d. Yes, because a high BMI will cause cancer.
a. Yes, because being overweight can cause heart disease.